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In a box, the ratio of red marbles to blue marbles is 7:4. Which of the following could be the total number of marbles in the box? (A) 18 (B) 19 (C) 21 (D) 22

 In a box, the ratio of red marbles to blue marbles is 7:4. Which of the following could be the total number of marbles in the box?
(A) 18 (B) 19 (C) 21 (D) 22

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5964 Points
10 months ago
Dear Student

Option (D) is correct here.
From the question it is given that, the ratio of red marbles to blue marbles is 7:4.
Now, let us assume the common factor of 7 and 4 be x.
So, the total number of marbles in the box = 7x + 4x
= 11x
Hence number of marbles in the box is a multiple of 11.
Therefore, 11 × 2 = 22


Thanks

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